revert: reverting react-day-picker to old version and returning date-fns

Author: PetrHendrych97

package.json

@@ -59,7 +59,7 @@
 		"lodash": "~4.17.21",
 		"nanoid": "~3.3.4",
 		"nouislider": "~15.7.2",
-		"react-day-picker": "~9.6.7",
+		"react-day-picker": "~8.7.1",
 		"react-dropzone": "~14.2.2",
 		"react-inlinesvg": "~3.0.1",
 		"react-pdf": "~8.0.2",
@@ -122,6 +122,7 @@
 		"babel-loader": "^8.2.5",
 		"core-js": "^3.25.2",
 		"csstype": "^3.1.2",
+		"date-fns": "^2.30.0",
 		"eslint": "^7.32.0",
 		"eslint-config-prettier": "^8.3.0",
 		"eslint-plugin-prettier": "^4.0.0",